CN201321983Y

CN201321983Y - Compressor crankshaft combination-type balance weight structure

Info

Publication number: CN201321983Y
Application number: CNU2008202007715U
Authority: CN
Inventors: 田村贵宽; 江锡林; 伍圣念; 曹骥; 赵艳玲; 黄启辉
Original assignee: HIACHI COMPRESSOR PRODUCTS (GUANGZHOU) CO Ltd
Current assignee: Johnson Controls Hitachi Wanbao Compressor Guangzhou Co Ltd
Priority date: 2008-09-19
Filing date: 2008-09-19
Publication date: 2009-10-07
Anticipated expiration: 2018-09-19

Abstract

The utility model relates to a refrigeration compressor, and provides a compressor combination-type balance weight structure, in particular to an eccentric balance element; the eccentric balance element is installed on a crankshaft of a compressor in an interference way through a shaft hole; the eccentric balance element is of an integral structure which is formed by two balance blocks which are overlapped onto each other through a pin; the balance blocks have at least two different thicknesses or radius; and each balance block is formed by punching an ordinary steel plate or a steel band. The eccentric element is formed by overlapping a plurality of balance blocks, so that a balance element which is applicable to different compressor crankshafts can be rapidly assembled by a plurality of balance blocks, thereby preventing the problems of the traditional balance element such as independent die sinking, the processing, and the like, and saving cost and working hours. The balance block which is formed by punching the ordinary steel plate or steel bank is adopted, so that the production efficiency can be improved, and the production cost can be reduced.

Description

A kind of compressor crank shaft combined type balance weight structure

Technical field

The utility model relates to refrigeration compressor, especially about the equilibrium structure of compressor crank shaft.

Technical background

Bent axle is important parts of compressor inside, by it the rotatory force of motor is passed to compression cylinder, realization is to the compression of refrigerant gas, and the lubricant oil that will be positioned at the compressor housing bottom simultaneously again takes each to by action of centrifugal force needs lubricated parts.Common bent axle has generally comprised eccentric axial portion, d-axis portion and equalizing feature, and the effect of equalizing feature has one, realizes the balance to eccentric axial portion; Two, make bent axle have enough inertia, the compressor motion is more steady.The position of equalizing feature is also different on the dissimilar compressor crank shafts, and common has: 1. the equalizing feature of compressor is between eccentric axial portion and d-axis portion and adopt the cast inblock formula, and this bent axle is more common in reciprocal compressor; 2. the equalizing feature of compressor is installed on the d-axis portion of bent axle, and this structure is more common in scroll compressor.

Normally, the mounting type equalizing feature is to manufacture with the processing of forging or metallic sintered products to become the d-axis portion that is fit into bent axle after the integrated type again with interference fit, and there is following problem in this equalizing feature in manufacture process:

1. it is more to carry out the cutting position, and process time is longer, and manufacturing efficiency is low.

2. the manufacture process environmental pollution is serious, is unfavorable for environmental protection.

3. because the equalizing feature of the compressor correspondence of each model has nothing in common with each other, thereby the equalizing feature of each model compressor needs to produce separately, needed mould is many;

4. cost of production height.

The model utility content

The purpose of this utility model is to propose the box-like balance weight structure of a kind of compressor bank, and it has simple in structure, easy processing, and advantages such as compressor crank shaft use that adapt to different model capable of being combined.

The utility model is realized by following technical solution:

The box-like balance weight structure of a kind of compressor bank, it is an eccentric balance spare, it is installed on the bent axle of compressor in the interference mode by axis hole, it is characterized in that: this eccentric balance spare is to be connected by pin or be welded into monolithic construction by the superimposed back of at least two equilibrium blocks.

Equilibrium block has two kinds of different boundary dimension at least, and boundary dimension is meant thickness or radius.

Described equilibrium block is to be formed by general steel plate or steel band punch process.

The beneficial effects of the utility model are:

1. the utility model is to be formed by stacking by some equilibrium blocks, its weight and position of centre of gravity can be adjusted adaptive according to the designing requirement of compressor crank shaft, assembly goes out to be suitable for the counterbalance that various compressor crank shafts use so fast, thereby avoided the conventional balanced part to need production problems such as independent die sinking, processing, saved cost and man-hour.

2. the equilibrium block of Compositional balance spare adopts general steel plate or steel band punch process to form, and can improve manufacturing efficiency, reduce production costs.

Description of drawings

Fig. 1 is structural representation of the present utility model (the B-B sectional view of Fig. 2);

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is for adopting a kind of crankshaft structure schematic representation of the present utility model;

Fig. 4 is for adopting a kind of scroll compressor structural representation of the present utility model.

Embodiment

With reference to figure 1, Fig. 2 and Fig. 3, Fig. 1 and Fig. 2 have provided a kind of compressor crank shaft combined type balance weight structure, it is an eccentric balance spare 1, it is installed on the d-axis portion (as Fig. 3) of the bent axle 2 of compressor with interference fit by self through hole 13, the top of compressor crank shaft 2 is the eccentric shafts 21 that are used to drive movable orbiting scroll, because compressor crank shaft can produce when rotating and be subjected to force unbalance, so will counterbalance 1 be installed in its d-axis portion, to realize the balance of eccentric axial portion and to make the compressor motion more steady.

Counterbalance 1 is formed by stacking by some fan-

shaped equilibrium blocks

11 and 12, be equipped with on the

equilibrium block

11 and 12 cooperate with d-axis etc. radius endoporus 13, equilibrium block 11 is different with the size of equilibrium block 12, for ease of the assembling of

equilibrium block

11 and 12, each equilibrium block is provided with two pin-and-holes 14 with respect to the same position of axially bored line in it.Aborning,

equilibrium block

11 and 12 can directly carry out punching press cold working by general steel plate or steel band and form, and has improved manufacturing efficiency so greatly.

After finishing the processing of equilibrium block, choose some equilibrium blocks (generally speaking can by increasing or reduce the quantity of equilibrium block or choosing the center of gravity that the equilibrium block of different-thickness/radius is regulated quantum balancing spare) according to the specification of compressor model/bent axle, then pin is inserted in pin-and-hole 14 and can form combined type counterbalance 1.

Each equilibrium block also can form combined type counterbalance 1 by the form of welding, specifically can be according to each producer's actual production conditions decision.

In conjunction with reference to figure 4, Fig. 4 has provided an application example of the present utility model: a kind of scroll compressor that adopts the combined type balance weight structure, it includes housing 3, frame 6 is installed in the housing 3, frame 6 central authorities establish axis hole 60, axis hole 60 tops install and fix scroll 4 and motion vortex dish 5, excentric sleeve 51 is established in motion vortex dish 5 belows, excentric sleeve 51 lower end surfaces become sliding bearing to contact with central axis hole 60 upper-end surfaces of frame 6, make fixed scroll 4 and motion vortex dish 5 constitute the vortex compression chamber, one bent axle 2 passes the central axis hole 60 of frame 6, the eccentric part 21 of bent axle 2 inserts in the excentric sleeve 51 of motion vortex dish 5, central axis hole 60 belows of frame 6 are provided with bearing bore 61, one bearing 7 is installed in this bearing bore 61, one axial thrust seal arrangement 6 is installed on and holds axocoel 61 lower ends with bearing 7 supports, and the side of bearing bore 61 is provided with a spill port 62, one return tubes 8 are connected to below in the housing 3 from spill port 62 oil sump 15; The upper and lower end portion of bent axle 2 is fixing with bearing 7 and spring bearing 10 respectively, and the counterbalance 1 and the rotor 9 of present embodiment is installed on the bent axle 2, and the oil absorbing end of bent axle 2 extends the oil sump 15 that is inserted in below in the housing 3.

Claims

1. compressor crank shaft combined type balance weight structure, it is an eccentric balance spare, it is installed on the bent axle of compressor in the interference mode by axis hole, it is characterized in that: this eccentric balance spare is to be connected by pin or be welded into monolithic construction by the superimposed back of at least two equilibrium blocks.

2. compressor crank shaft combined type balance weight structure as claimed in claim 1 is characterized in that: equilibrium block has two kinds of different boundary dimension at least, and described boundary dimension is meant thickness or radius.

3. compressor crank shaft combined type balance weight structure as claimed in claim 1 or 2 is characterized in that: described equilibrium block is to be formed by general steel plate or steel band punch process.